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Structure 1.1–1.3 — particles, the nuclear atom and electron configurationsWhat's in the bubbles of boiling water?Start → - 2
Structure 1.4–1.5 — counting particles by mass; ideal gasesHow many water molecules are in a single drop of water?Start → - 3
Structure 2 — models of bonding and structureSalt is made of charged particles. So why doesn't a salt crystal conduct electricity?Start → - 4
Structure 3.1 — the periodic table and periodicityWhy is helium in group 18 when its atoms have only two electrons?Start → - 5
Structure 3.2 — functional groupsHow can C₂H₆O be both a liquid and a gas at room temperature?Start → - 6
Reactivity 1 — what drives reactionsWhen a cold pack goes cold, has the chemical inside lost energy or gained it?Start → - 7
Reactivity 1.2 & 1.4 (AHL) — energy cycles, entropy and Gibbs energyCarbon and hydrogen don't combine cleanly to make methane. So how does the data booklet know its ΔH⦵f?Start → - 8
Reactivity 2.1 — the amount of chemical changeCan burning 1 kg of charcoal really make more than 3 kg of carbon dioxide?Start → - 9
Reactivity 2.2 & 2.3 — rate and extent of reactionA speed camera clocks a car at one instant. How do you clock a reaction at one instant?Start → - 10
Reactivity 2.2 & 2.3 (AHL) — rate laws, mechanisms and KcWhy doesn't adding more bromine speed up the bromination of propanone?Start → - 11
Reactivity 3.1 — proton transfer reactionsIs water an acid or a base?Start → - 12
Reactivity 3.1 (AHL) — Ka, Kb, buffers and pH curvesWhat is the pH of boiling pure water?Start → - 13
Reactivity 3.2 — electron transfer reactionsWhen iron rusts, does it gain or lose electrons?Start → - 14
Reactivity 3.2 (AHL) — electrode potentials and electrolysisHow can you measure the voltage of half a battery, when a voltmeter needs two connections?Start → - 15
Reactivity 3.3 & 3.4 — electron sharing and electron-pair sharingWhy does bromine in hexane stay orange in the dark but lose its colour in sunlight?Start →